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@@ -89,11 +89,11 @@ typedef void (^MJRefreshComponentEndRefreshingCompletionBlock)(void);
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/** 摆放子控件frame */
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- (void)placeSubviews NS_REQUIRES_SUPER;
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/** 当scrollView的contentOffset发生改变的时候调用 */
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-- (void)scrollViewContentOffsetDidChange:(NSDictionary *)change NS_REQUIRES_SUPER;
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+- (void)scrollViewContentOffsetDidChange:(nullable NSDictionary *)change NS_REQUIRES_SUPER;
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/** 当scrollView的contentSize发生改变的时候调用 */
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-- (void)scrollViewContentSizeDidChange:(NSDictionary *)change NS_REQUIRES_SUPER;
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+- (void)scrollViewContentSizeDidChange:(nullable NSDictionary *)change NS_REQUIRES_SUPER;
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/** 当scrollView的拖拽状态发生改变的时候调用 */
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-- (void)scrollViewPanStateDidChange:(NSDictionary *)change NS_REQUIRES_SUPER;
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+- (void)scrollViewPanStateDidChange:(nullable NSDictionary *)change NS_REQUIRES_SUPER;
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#pragma mark - 其他
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Frank